含裂纹高强钢丝的腐蚀损伤与拉伸性能研究  

Corrosion Damage and Tensile Properties of High Strength Steel Wires with Cracks

作　　者：于伟 王鑫 高洋 朱万旭[1] 刘其舟 吉钰纯 YU Wei;WANG Xin;GAO Yang;ZHU Wan-xu;LIU Qi-zhou;JI Yu-chun(College of Civil Engineering,Guilin University of Technology,Guangxi Key Laboratory of Green Building Materials and Construction Industrialization,Guilin 541004,China;School of Materials Science and Engineering,Guilin University of Technology,Key Laboratory of Nonferrous Materials and New Processing Technology of Ministry of Education,Guilin 541004,China)

机构地区：[1]桂林理工大学土木工程学院,广西绿色建材与建筑工业化重点实验室,桂林541004 [2]桂林理工大学材料科学与工程学院,有色金属及材料加工新技术教育部重点实验室,桂林541004

出　　处：《科学技术与工程》2024年第8期3330-3340,共11页Science Technology and Engineering

基　　金：广西科技基地和人才专项(桂科AD19245127);国家自然科学基金(52068013,51868013);广西科技重大专项(桂科AA18118008);广西自然科学基金(2022GXNSFAA035581)。

摘　　要：为了研究桥梁含裂纹拉索钢丝的腐蚀损伤机理和受拉力学特性,以含预置裂纹的腐蚀高强钢丝为研究对象,采用电弧线切割方法、中性盐雾腐蚀试验、拉伸试验、电镜试验和有限元分析,开展相关内容研究。提出了考虑中性盐雾腐蚀影响的含裂纹高强钢丝拉伸受力性能的评价方法。结果表明:刻痕的应力集中系数远大于正常腐蚀蚀坑的系数,钢丝力学性能的变化是由于初始裂纹进一步腐蚀而引起,特别在腐蚀初期,钢丝处于非常不利的阶段,其受拉性能较低。建立的初始裂纹钢丝有限元模型,能较好地描述中性盐雾腐蚀试验和静力拉伸试验得出的质量损失率、截面面积损失率及极限强度的关系。In order to study the corrosion damage mechanism and tensile properties of cracked cable steel wires in bridges,the corroded high-strength steel wires with preset a crack were investigated by arc cutting method,neutral salt spray corrosion test,tensile test,electron microscope test and finite element analysis.An method for evaluating the tensile mechanical properties of steel wires with cracks was proposed.The results show that the stress concentration coefficient of the notch is much larger than that of the normal corrosion pit,and the change of the mechanical properties of the steel wire is caused by the further corrosion of the initial crack.The finite element model of initial crack steel wire can well describe the relationship of mass loss rate,the cross-sectional area loss rate and the ultimate strength obtained from the neutral salt spray corrosion test and the static tension test.

关 键 词：高强钢丝 初始裂纹 腐蚀损伤机理 拉伸性能 

分 类 号：TU394[建筑科学—结构工程]